If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection For those of you that take ghk cu, why is this so bad? It's never been this bruised. But is always swollen, red, and burns like hell. I can only tolerate every other Subcutaneous Injection Sites and Instructions for Safe Self Administration GHK Cu Copper Peptide Skin & Healing Beverly Hills GHK CU Crepey Skin Escape Platinum Skin Care